I found a new chamber! It's fairly hidden, but there's nothing in it really, it's just another dead end.
While drawing parts of the fist path, I noticed that next to doorway number 25 (near the beginning of Fist path, middle right) it looked as though there might be a passage, there isn't really an actual doorway in view, but the other end of doorway #25 looks just the same, when I checked it ingame to see if my suspicions were right, I found a hidden chamber.
Anyone else seen this room before? Here's a screenshot of the room.
So the number of doors is now up to 53 and number of rooms up to 44. The number of Goldguys in the Labyrinth is four btw.
The problem though, is that I have to rearange a few rooms now.